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Arduino HC-SR04 Ultrasonic Sensor Tutorial. Measure Distance with Code & Wiring Diagram

Arduino HC-SR04 Ultrasonic Sensor Tutorial: Measure Distance with Code & Wiring Diagram Meta description: Learn how to wire and program an HC-SR04 ultrasonic sensor with Arduino to measure distance in centimeters and inches — full code and troubleshooting included. Introduction The HC-SR04 ultrasonic sensor is one of the most widely used components in beginner Arduino projects. It measures distance by sending out a sound wave and timing how long it takes to bounce back — the same basic principle used by bats and sonar. In this tutorial, you'll learn how to wire the HC-SR04 to an Arduino, program it to measure distance, and display accurate readings in both centimeters and inches using the Serial Monitor. What This Project Does You'll build a simple distance-measuring circuit where the Arduino triggers the HC-SR04 to send an ultrasonic pulse, measures the time ...
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ESP32 Web Server | Display DHT22 Temperature & Humidity in Your Browser

ESP32 Web Server: Display DHT22 Temperature & Humidity in Your Browser Meta description: Turn your ESP32 into a local web server that displays live DHT22 temperature and humidity readings in any browser on your network — full code included. Introduction If you've already wired up a DHT22 sensor to your ESP32 (see our ESP32 DHT22 tutorial), the next logical step is getting rid of the Serial Monitor and viewing your readings on an actual web page — from your phone, laptop, or any device on your network. In this tutorial, you'll turn your ESP32 into a self-hosted web server that displays live temperature and humidity data from the DHT22 sensor directly in your browser. What This Project Does The ESP32 connects to your Wi-Fi network, hosts a simple web page, and refreshes temperature and humidity readings from the DHT22 sensor automatically. No inte...
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ESP32 DHT22 Temperature & Humidity Sensor Tutorial

ESP32 DHT22 Temperature & Humidity Sensor Tutorial (With Code & Wiring Diagram) Meta description: Learn how to connect a DHT22 sensor to an ESP32 and read temperature and humidity data with this complete wiring diagram, code, and troubleshooting guide. Introduction The DHT22 is one of the most popular sensors for measuring temperature and humidity in DIY electronics and IoT projects. Paired with an ESP32 — a microcontroller with built-in Wi-Fi and Bluetooth — it's a great starting point for weather stations, home automation systems, or any project that needs environmental data. This guide walks through wiring the DHT22 to an ESP32, writing the code to read sensor data, and displaying temperature and humidity readings on the Serial Monitor. What This Project Does You'll build a simple circuit where the ESP32 reads temperature (in Celsius and F...
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